Programmable Bipolar and Unipolar Nonvolatile Memory Devices Based on Poly(2‐(N‐carbazolyl)ethyl methacrylate) End‐Capped with Fullerene

A novel polymer, poly(2-(N -carbazolyl)ethyl methacrylate) end-capped with fullerene (PCzMA-C(60) ), has been synthesized via living anionic polymerization. Electrically programmable flash memory devices were easily fabricated with this polymer by using solution coating and metal deposition. This polymer was found in these devices to exhibit bipolar and unipolar switching behaviors with a high ON/OFF current ratio, a long retention time, high reliability, and low power consumption. The excellent properties and easy processability of this polymer open up the possibility of the mass production of high performance nonvolatile memory devices at low cost.

[1]  Dong Min Kim,et al.  Novel Rewritable, Non‐volatile Memory Devices Based on Thermally and Dimensionally Stable Polyimide Thin Films , 2008 .

[2]  Yan Song,et al.  Nonvolatile polymer memory device based on bistable electrical switching in a thin film of poly(N-vinylcarbazole) with covalently bonded C60. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[3]  Peter Mark,et al.  Space‐Charge‐Limited Currents in Organic Crystals , 1962 .

[4]  Stephen R. Forrest,et al.  Direct observation of structural changes in organic light emitting devices during degradation , 2001 .

[5]  Olli Ikkala,et al.  Fullerene-based bistable devices and associated negative differential resistance effect , 2005 .

[6]  K. Sugiyama,et al.  A supramolecular approach on using poly(fluorenylstyrene)-block-poly(2-vinylpyridine):PCBM composite thin films for non-volatile memory device applications. , 2011, Macromolecular rapid communications.

[7]  J. Frenkel,et al.  On Pre-Breakdown Phenomena in Insulators and Electronic Semi-Conductors , 1938 .

[8]  Dongge Ma,et al.  Organic Reversible Switching Devices for Memory Applications , 2000 .

[9]  Zhenan Bao,et al.  Organic field‐effect transistors with high mobility based on copper phthalocyanine , 1996 .

[10]  Sang-Hyun Hong,et al.  Novel Digital Nonvolatile Memory Devices Based on Semiconducting Polymer Thin Films , 2007 .

[11]  A. Pal,et al.  Large conductance switching and binary operation in organic devices: Role of functional groups , 2003 .

[12]  Yan Song,et al.  Non‐Volatile Polymer Memory Device Based on a Novel Copolymer of N‐Vinylcarbazole and Eu‐Complexed Vinylbenzoate , 2005 .

[13]  Ken Eguchi,et al.  Switching and memory phenomena in Langmuir–Blodgett films , 1988 .

[14]  Dong Min Kim,et al.  Electrical memory characteristics of a nondoped pi-conjugated polymer bearing carbazole moieties. , 2010, The journal of physical chemistry. B.

[15]  E. Kay,et al.  Dielectric breakdown of polymer films containing metal clusters , 1988 .

[16]  Kevin L. Jensen,et al.  Electron emission theory and its application: Fowler–Nordheim equation and beyond , 2003 .

[17]  S. Möller,et al.  A polymer/semiconductor write-once read-many-times memory , 2003, Nature.

[18]  Donal D. C. Bradley,et al.  Space-charge limited conduction with traps in poly(phenylene vinylene) light emitting diodes , 1997 .

[19]  M. Knupfer,et al.  Strong chemical interaction between indium tin oxide and phthalocyanines , 2002 .

[20]  Jason D. Monnell,et al.  Conductance Switching in Single Molecules Through Conformational Changes , 2001, Science.

[21]  Tae Whan Kim,et al.  Effect of Fullerene Concentration on Flat-Band Voltage Shift of Capacitance–Voltage Curve in Organic Memory Devices Fabricated Using Hybrid Poly(4-vinyl phenol) Active Layer Containing Fullerene , 2008 .

[22]  D. Morgan,et al.  Electrical phenomena in amorphous oxide films , 1970 .

[23]  M. Chhowalla,et al.  Memory effect in thin films of insulating polymer and C60 nanocomposites , 2006 .

[24]  Dong Min Kim,et al.  Programmable Digital Memory Characteristics of Nanoscale Thin Films of a Fully Conjugated Polymer , 2009 .

[25]  Sang-Hyun Hong,et al.  High‐Performance Programmable Memory Devices Based on Hyperbranched Copper Phthalocyanine Polymer Thin Films , 2008 .